2666444441407 has 2 divisors, whose sum is σ = 2666444441408. Its totient is φ = 2666444441406.

The previous prime is 2666444441341. The next prime is 2666444441411. The reversal of 2666444441407 is 7041444446662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2666444441407 - 2³¹ = 2664296957759 is a prime.

It is a super-2 number, since 2×2666444441407² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2666444441467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1333222220703 + 1333222220704.

It is an arithmetic number, because the mean of its divisors is an integer number (1333222220704).

Almost surely, 2^{2666444441407} is an apocalyptic number.

2666444441407 is a deficient number, since it is larger than the sum of its proper divisors (1).

2666444441407 is an equidigital number, since it uses as much as digits as its factorization.

2666444441407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12386304, while the sum is 52.

The spelling of 2666444441407 in words is "two trillion, six hundred sixty-six billion, four hundred forty-four million, four hundred forty-one thousand, four hundred seven".